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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.viewsupport;
  12
  13 import net.sourceforge.phpdt.core.IJavaElement;
  14 import net.sourceforge.phpdt.internal.ui.PHPUIMessages;
  15
  16 import org.eclipse.core.resources.IContainer;
  17 import org.eclipse.core.resources.IResource;
  18 import org.eclipse.jface.action.IStatusLineManager;
  19 import org.eclipse.jface.viewers.ISelection;
  20 import org.eclipse.jface.viewers.ISelectionChangedListener;
  21 import org.eclipse.jface.viewers.IStructuredSelection;
  22 import org.eclipse.jface.viewers.SelectionChangedEvent;
  23
  24 /**
  25  * Add the <code>StatusBarUpdater</code> to your ViewPart to have the
  26  * statusbar describing the selected elements.
  27  */
  28 public class StatusBarUpdater implements ISelectionChangedListener {
  29
  30         private final int LABEL_FLAGS = JavaElementLabels.DEFAULT_QUALIFIED
  31                         | JavaElementLabels.ROOT_POST_QUALIFIED
  32                         | JavaElementLabels.APPEND_ROOT_PATH
  33                         | JavaElementLabels.M_PARAMETER_TYPES
  34                         | JavaElementLabels.M_PARAMETER_NAMES
  35                         | JavaElementLabels.M_APP_RETURNTYPE
  36                         | JavaElementLabels.M_EXCEPTIONS
  37                         | JavaElementLabels.F_APP_TYPE_SIGNATURE;
  38
  39         private IStatusLineManager fStatusLineManager;
  40
  41         public StatusBarUpdater(IStatusLineManager statusLineManager) {
  42                 fStatusLineManager = statusLineManager;
  43         }
  44
  45         /*
  46          * @see ISelectionChangedListener#selectionChanged
  47          */
  48         public void selectionChanged(SelectionChangedEvent event) {
  49                 String statusBarMessage = formatMessage(event.getSelection());
  50                 fStatusLineManager.setMessage(statusBarMessage);
  51         }
  52
  53         protected String formatMessage(ISelection sel) {
  54                 if (sel instanceof IStructuredSelection && !sel.isEmpty()) {
  55                         IStructuredSelection selection = (IStructuredSelection) sel;
  56
  57                         int nElements = selection.size();
  58                         if (nElements > 1) {
  59                                 return PHPUIMessages
  60                                                 .getFormattedString(
  61                                                                 "StatusBarUpdater.num_elements_selected", String.valueOf(nElements)); //$NON-NLS-1$
  62                         } else {
  63                                 Object elem = selection.getFirstElement();
  64                                 if (elem instanceof IJavaElement) {
  65                                         return formatJavaElementMessage((IJavaElement) elem);
  66                                 } else if (elem instanceof IResource) {
  67                                         return formatResourceMessage((IResource) elem);
  68                                 }
  69                         }
  70                 }
  71                 return ""; //$NON-NLS-1$
  72         }
  73
  74         private String formatJavaElementMessage(IJavaElement element) {
  75                 return JavaElementLabels.getElementLabel(element, LABEL_FLAGS);
  76         }
  77
  78         private String formatResourceMessage(IResource element) {
  79                 IContainer parent = element.getParent();
  80                 if (parent != null && parent.getType() != IResource.ROOT)
  81                         return element.getName() + JavaElementLabels.CONCAT_STRING
  82                                         + parent.getFullPath().makeRelative().toString();
  83                 else
  84                         return element.getName();
  85         }
  86
  87 }